Double swinging door



2 Sheets-Sheet 1.

Patented Dec. 31, 1889.

J. WELTER. DOUBLE SWINGING DOOR.

flttorney,

Inventor N. PETER5, Photoillhogmphur, Washmglon. D. C.

Witnesses (No Model.)

, (No Model.) '2 Sheets-Sheet 2.

J. WELTER. DOUBLE SWINGING DOOR.

N0. 418 255. Patented Dec. 31, 1889.

Witnesses: I Inventor:

ATENT OFFICE.

JOSEPH IVELTER, OF BUFFALO, NEIV YORK.

DOUBLE swmcme DOOR."

SPECIFICATION forming part of Letters Patent No. 418,255, dated December31,1889.

Application filed April 29, 1889.

Serial No. 309,021. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH. l/VELTER, of Buffalo, in the county of Erieand State of New York, have invented certain new and useful Improvementson Double Swinging Doors; and I do hereby declare that the followingdescription of my said invention, taken in connection with theaccompanying sheets of drawings, forms a full, clear, and exactspecification, which will enable others skilled in the art to which itappertains to make and use the same. 4

This invention has general reference to double swinging doors; and itsobject is the production of a door for buildings capable of being openedon either side.

It consists, essentially, in the novel and pe culiar combination ofparts and details of construction, as hereinafter first fully set. forthand described, and then pointed out in the claims.

In the drawings already mentioned, which serve to illustrate my saidinvention more fully, Figure 1 is a front elevation of a door and itsframe constructed in accordance with my invention. Fig. 2 is atransverse sectional elevation of the same in line 0c 00 of Fig.1. Fig.3 is a detached plan of the irons and mechanism for hinging the door.Fig. 4 is a longitudinal sectional elevation in line z of Fig. 3. Figs.5 and 6 are plans below the line 11y of Fig. 1, showing the door in itsdifferent positions when opened on either side. Fig. 7 is a transversesectional elevation of a portion of the hinge-irons in line 10 of Fig.(i.

Like parts are designated by corresponding letters of reference in allthe figures.

A in the drawings designates the doorframe, and B the door, the latterbeing supplied with the usual door-knobs G O and locks, (not shown)except that in place of only one set of such door knobs and lock myimproved door is supplied with two sets, one near each edge of the door.This door may be opened by operating either of the doorknobs, and toenable me to do so I hinge the door in a peculiar manner by means ofhingeplates on the top and bottom edges of said door. These plates beingalike on both the top and bottom edges, I shall in describing them referto but the top set thereof, it being understood that the descriptionthereof applies also to the bottom set.

D D are two plates of about one-eighth of an inch in thickness and oneinch in width, having substantially circular heads E F. and aperturesce,by means of which they are secured to the top and inside portion G Gof the door-frame and threshold respectively.

In the head E of the plate D there is a curved slot or aperture F, thecenter of the curve of which is in the center of the head E,

there being in said head E a circular aperture for the reception of acylindrical pivot the latter being the pintle around which the doorswings when opened from the side having the knob C.

To the plate D there is movably secured by the pintle F a plate H, beingof a length corresponding to that of the width of the door, so that it,as well as a further plate I, located directly underneath said plate H,are perfect matches when placed one above the other. This plate H hastwo heads 11 H, the latter being connected with the head I by a pintleJ, riveted tightly to said head. I"

and turning loosely in the head I This pintle is of a length exceedingthe thickness of the three plates D II I, and it has grooves jj, Fig. 7,to form a neck a, Fig. 4., which neck engages the curved slot F in thehead of the plate D in a manner hereinafter to be referred to.

The plate I is secured to the top (respectively the bottom) edge of thedoor by means of screws in any suitable manner. It has an aperturethrough which a pin K is passed, said pin having a spring S actingagainst it to push it through said plate I.

In the plate II there is an aperture L, Fig. 5, corresponding with thatin the plate I, the object of which is to receive the pin K and by it toconnect the platesI and II and to hold them opposite each othersufiiciently so to enable the door being opened by the knob C, it thenswinging on the pintle F, yet not so much so but that when the door isopened by said knob C said pin can slip out of the aperture L to allowthe door to swing on the pintle. It will now be readily observed. thatwhen the door is opened by the door knob (3 the plates H and I swingtogether around the pintle F on the right-hand side of the door, theneck a of the pintle J passing through the slot F in the head E, whilewhen the door 5 is opened by the knob O the plate I swings around withthe door, the pintle J being the pivotal point, it being noticed that assoon as the door swings open but a trifle the pintle J has turned in theslotted aperture F suffi- I ciently to prevent the door from swingingoutof said slot-hole.

There is but one position in which the door can be entirely removed fromthe frame, which is when both knobs are turned at the I same time andthe door pushed so as to swing the pintle J out of the slots F; but toprevent this as much as possible I locate curled springs M in front ofthe pintle J, so as to re- I claim as new and desire to secure to me bvtain them in said slots with sufficent force to Letters Patent '1 holdthe door for the moment when it is be- 1. The combination, with theframe A, of

- ing opened by the knob 0, not enough so, the doorB,havingthe two setsof hinge-plates, 6 however, to interfere with its being opened eachconsisting of the plates D, D, H, and I, by the knob C and the pintle Jmoved out of the plates D D being secured to the doorthe slot F. v frameand the plates I to the door, the plates 2 5 It will be readily observedthat the advan- I being connected by the intermediate tages derived fromthe construction of this plates H, in the manner as and for the pur- 7cdoor, aside from novelty, are that in a dark pose set forth. hall andother places where the door-knob l 2. The combination, in doubleswinging cannot be seen, and, m'fact, at night on any doors, of the doorA and frame B, the threshdoor, it is immaterial on which side a partyold G, and the hinge-plates consisting of the may try to find the knob,he being able to plates D, D, H, and I, the said plates H beopen thedoor on either side. The longitudiing pivoted to the plates D with oneend and nal edges of the door are curved to a segto the plates I withthe other end, said plates ment of a circle at N and the casing A rab- HI having pintles J, .providedwith necks a,

3 5 beted correspondingly at O. I find this or a engaging slottedapertures F in the plates D,

1' similar arrangement desirable, for the reason as and for the objectstated. that a square-edged door fitting the casing a In testimony thatI claim the foregoing as snug fit could not swing out of the casing myinvention I have hereto set my hand in without the edges being beveled.By makthe presence of two subscribing witnesses.

o ing them curved, as described, I derive the advantage of a close fitof the door to prevent J OS; l/VELTER. drafts, though it may not fit thecasin g snugly.

Another advantage of my construction is that the metallic plates I beingfastened to the door and working smoothly upon the plates H, and thelatter in turnbeingin close contact with the plates D D, fastened to thedoor-frame, (respectively to the threshold,) the said door fits sonicely and snuglyinto its casing as to effectually prevent ingress ofcold-air drafts, and-thereby produces quite a saving of fuel in thewinter-time, besides the advantage of not exposing the inmates of a roomto the danger of catching cold.

The door and its trimmings may be manufactured at but a slightadditional cost over that of an ordinary door, and since it can becompleted in a factory it does not prevent their being made in" largequantities ready for the market.

Having thus fully described my invention,

Attest:

MICHAEL J. STARK, WM. 0. STARK.

